Patio heater



FIG. 1 is a front elevation view of a patio heater showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof, however, the portions of the patio heater shown in broken lines form no part of the claimed design;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a rear perspective view thereof. 

The ornamental design for a patio heater, as shown and described. 